Home / 15,588.78-21,512.20-8,874.27

Finding the Fourth Proportional to 15,588.78, 21,512.20 and 8,874.27

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Solution

The fourth proportional to 15,588.78, 21,512.20 and 8,874.27 is: 12,246.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,588.78 : 21,512.20 = 8,874.27 : x
  2. Step 2: Convert to fraction form
    15,588.78/21,512.20 = 8,874.27/x
  3. Step 3: Cross multiply
    15,588.78x = 21,512.20 × 8,874.27
  4. Step 4: Simplify right side
    15,588.78x = 190,905,071.09
  5. Step 5: Solve for x
    x = 190,905,071.09/15,588.78
  6. Step 6: Final answer
    x = 12,246.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.